Having had to restore from tape in very stressful circumstances, if I still did sys admin on that sort of thing I would definitely be paranoid enough to want a

Having had to restore from tape in very stressful circumstances, if I still did sys admin on that sort of thing I would definitely be paranoid enough to want a second tape off-site. If not daily, then at least on some sort of regular rotation. Though it would depend on the criticality, and for anything really critical I'd want a colo storage server as well. If the data is critical then even for a relatively small business $15k in upfront costs for the tape drives and lots of tapes and annual costs at the colo center wouldn't be all that much.